We're back now at 7:41 with a big break in the search for Madeleine Mccann. Police have shut down an area the size of three football fields looking for new clues right now in her mysterious disappearance. ABC's lama Hasan is in London with us for the very latest. Lama. Reporter: And good morning to you, well, this morning Scotland yard detectives and Portuguese police are launching a massive search operation in what they say is a, quote, substantial phase of operational activities. This he try to identify what happened to little Madeleine Mccann. Portuguese police are beginning their big search to find out what happened to little Madeleine Mccann. She was just 3 years old when she vanished without a trace from this picturesque Portuguese resort seven years ago. Just 300 yard as way this morning, detectives are swarming the scrubland searching for clues. We love you, Madeleine. We miss every day as we did that very first day and we're waiting for you. We're never going to give up and we'll do whatever we can to find you. Reporter: Scouring the area the size of three football fields where a suspect was seen walking away with a little girl in his arms the night she disappeared. ? after launching a TV appeal eight months ago spurring thousands of calls, new clues about suspects and new lines of inquiry leading detectives to search these areas. Police will be inspecting the ground looking for land that may have been disturbed. If it has police will then move in using sniffer dogs and high-tech radar equipment to begin digging. That was my shoes. Reporter: Maddie went missing while on vacation with her parents, Kate and Gerry Mccann and two siblings in 2007 her parents dining at a restaurant a stone's throw away never giving up hope of finding their little daughter. Police are reportedly expected to be in the area for days as they work to identify changes in the terrain which would then require further investigation. As for Madeline's parents they're not in Portugal at the moment but being kept up to date with any new developments. Lara. Thank you so much.

This transcript has been automatically generated and may not be 100% accurate.

Parents of Maddie McCann: 'We're Never Going to Give Up'

The parents of the missing girl speak out on the seventh anniversary of her abduction.

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